Quantum coherence of planar spin models with Dzyaloshinsky-Moriya interaction
| Autor: | Igor Ermakov, Chandrashekar Radhakrishnan, Tim Byrnes |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Quantum phase transition
Physics Quantum Physics Phase transition Condensed matter physics FOS: Physical sciences Spin engineering Classical XY model 01 natural sciences 010305 fluids & plasmas Qubit Quantum mechanics 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Quantum Physics (quant-ph) 010306 general physics Quantum Coherence (physics) Spin canting |
| Zdroj: | Physical Review A. 96 |
| ISSN: | 2469-9934 2469-9926 |
| Popis: | The quantum coherence of one dimensional planar spin models with the Dzyaloshinsky-Moriya interaction is investigated. The anisotropic XY model, the isotropic XX model and the transverse field model are studied in the large N-limit using the two qubit reduced density matrices and the two point correlation functions. From our investigations we find that the coherence as measured using the Jensen-Shannon divergence can be used to detect the quantum phase transitions and the quantum critical points. The derivative of coherence shows non-analytic behavior at the critical points leading to the conclusions that these transitions are of second order. Further we show that the presence of the Dzyaloshinsky-Moriya coupling suppresses the phase transition due to the residual ferromagnetism which is caused by spin canting. accepted for publication in Physical Review A |
| Databáze: | OpenAIRE |
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